Everyone's is sharing their own opinion but no one knows the exact reason. Who wants to hold for a long time, they can buy now, but this is not the right time to buy bitcoin for the short time holder. Because the price may decrease again and it can go under 6K USD this month!
That's right because there is never certainty about the next bitcoin price movement, so we have to really round up the choice before deciding to buy or sell. But the one I got from here is that Bitcoin is not controlled by USD.